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Commit adcdb94e authored by Marc Zyngier's avatar Marc Zyngier
Browse files

irqchip/gic-v3-its: Generalize LPI configuration 



We're are going to need to change a bit more than just the enable
bit in the LPI property table in the future. So let's change the
LPI configuration funtion to take a set of bits to be cleared,
and a set of bits to be set.

This way, we'll be able to use it when a guest updates an LPI
property (priority, for example).

Reviewed-by: default avatarEric Auger <eric.auger@redhat.com>
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 70cc81ed

drivers/irqchip/irq-gic-v3-its.c

+11 −10
Original line number Diff line number Diff line
@@ -684,17 +684,18 @@ static inline u32 its_get_event_id(struct irq_data *d) 
	return d->hwirq - its_dev->event_map.lpi_base;

}



static void lpi_set_config(struct irq_data *d, bool enable)

static void lpi_update_config(struct irq_data *d, u8 clr, u8 set)

{

	struct its_device *its_dev = irq_data_get_irq_chip_data(d);

	irq_hw_number_t hwirq = d->hwirq;

	u32 id = its_get_event_id(d);

	u8 *cfg = page_address(gic_rdists->prop_page) + hwirq - 8192;

	struct page *prop_page;

	u8 *cfg;



	if (enable)

		*cfg |= LPI_PROP_ENABLED;

	else

		*cfg &= ~LPI_PROP_ENABLED;

	prop_page = gic_rdists->prop_page;



	cfg = page_address(prop_page) + hwirq - 8192;

	*cfg &= ~clr;

	*cfg |= set;



	/*

	 * Make the above write visible to the redistributors.
@@ -705,17 +706,17 @@ static void lpi_set_config(struct irq_data *d, bool enable) 
		gic_flush_dcache_to_poc(cfg, sizeof(*cfg));

	else

		dsb(ishst);

	its_send_inv(its_dev, id);

	its_send_inv(its_dev, its_get_event_id(d));

}



static void its_mask_irq(struct irq_data *d)

{

	lpi_set_config(d, false);

	lpi_update_config(d, LPI_PROP_ENABLED, 0);

}



static void its_unmask_irq(struct irq_data *d)

{

	lpi_set_config(d, true);

	lpi_update_config(d, 0, LPI_PROP_ENABLED);

}



static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val,